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Note 9 - Stockholders' Equity (Tables)
3 Months Ended
Mar. 31, 2022
Notes Tables  
Schedule of Stockholders' Equity Note, Warrants or Rights [Table Text Block]
  

2022

  

2021

 

Warrants outstanding at January 1

  1,015,000   515,000 

Common stock exchanged to prefunded warrant

  -   - 

Exercises and conversions

  -   - 

Warrants outstanding at March 31

  1,015,000   515,000 
Schedule of Nonvested Restricted Stock Units Activity [Table Text Block]
  

March 31, 2022

 
  

Number of

units

  

Weighted

Average
Grant-Date

Fair value

  

Aggregated

Intrinsic
Value

 
             

Outstanding, December 31, 2021

  149,636  $6.59  $- 

Granted

  479,208   3.34   - 

Vested and settled with share issuance

  (66,982

)

  (6.56

)

  - 

Forfeited

  -   -   - 

Outstanding, March 31, 2022

  561,862  $3.82  $-